JPS59221059A - Display system for information on number of trunk calling subscriber - Google Patents

Abstract

PURPOSE:To process smoothly the incoming cells of an automatic private branch exchange by displaying the information on the number of a trunk calling subscriber and therefore omitting an operation to inquire the number of the calling subscriber, etc. in a busy mode. CONSTITUTION:An office exchange 3 is connected to an automatic private branch exchange PABX via a central office trunk 2. When a trunk calling subscriber 4 connected to the exchange 3 dials the key number of the PABX, a ring-back tone 6 of the office side is heard from the exchange 3. In this case, the trunk 2 detects an incoming call through the PABX and this detection signal is sent to a central controller of the PABX. Then the dial number is received from the subscriber 4 and an answer signal is sent back to a trunk line with connection of a receiver 5. In this case, the subscriber 4 hears a dial tone 8 of the PABX side and dials the extension number to be called or the call number of an attendant board 1. Then the additional dial is received from the subscriber 4, and the operator of the board 1 gives an answer. Thus the display data is sent to a number display interface circuit 9 from the central controller and displayed at the display part of the board 1.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a system for displaying number information of a central office line caller who receives a call to an automatic private branch exchange.

An object of the present invention is to provide a new display method that enables the subscriber number information of a central office line caller who receives a call to be displayed on the called extension telephone or relay stand. .

The present invention provides a system for detecting an incoming call from a central office line to an automatic private branch exchange, and then combining the called extension number or relay call number sent from the central office line calling party and the telephone number of the central telephone calling party sent following these numbers. It is characterized by receiving calling party number information such as a subscriber number or a unique identification number given to the calling party, and displaying this calling party number information on the called extension telephone or relay stand. do.

Next, an embodiment of the present invention will be explained with reference to all the drawings. Figure 1 shows a state in which a central line calling party 4 makes a call to an automatic private branch exchange (PABX). 4 is P
At! When you dial the main number of I
Listen to ringback tone 6 from the other station.

? At time 2, I) A B X detects an incoming call on the central office line trunk 2. This incoming call detection information is sent to the central control unit (not shown) of the PABX.

In FIG. 2, the PABX returns a response signal to the central office line and connects to a receiver 5ft in order to receive a dial further sent from the central office line caller 4. At this time, caller 4 is using PABX
The user listens to the dial toe 78 and dials the called extension number or the attendant number.

Subsequently, calling party number information is dialed, such as the subscriber number of the calling party 4 or a unique identification number assigned to the calling party (for example, an employee number). These numbers? PAf3
This is possible by identifying the number of digits of the called extension number that was first dialed to distinguish between the two. In other words, the first digit number is changed for each number of digits in the PA BX extension number. For example, in the case of a 4-digit extension, t is 4×××. Therefore, the number information to be sent from the central controller to the number display interface circuit 9 will be from the fourth end onward.When all additional dials from caller 4 are received, the connection shown in FIG. 31 will be established, and caller 4 will be connected. listens to the ringback tone from sound range 7 and displays an incoming call display on relay stand J. When the relay console operator responds, display data is sent from the central control device to the number display section interface circuit 9 and displayed on the number display section of the relay console 10.

As a result, the operator can confirm the subscriber number 2 of the calling party 4. In the above embodiment, the display starts when all called parties respond, but depending on the purpose of use, it may be set before the called party responds. Immerse yourself in it. It is also possible to make the number display section of the attendant stand capable of displaying characters and to display a name translated from the caller's identification number. Further, in this embodiment, the case of receiving a call from a relay desk has been described, but if a number display is provided for an extension telephone, the number can be displayed even when the called party is an extension.

As explained above, according to the present invention, by displaying the central office line originating subscriber number information, it is possible to omit the operation of inquiring about the subscriber number of the caller during a call, and also to Since the caller can be identified, smooth responses can be made◎

[Brief explanation of the drawing]

1, 2 and 3 are relay system diagrams showing one embodiment of the present invention. 1... Office line relay stand, 2.-
... central office line trunk, 3 ... central office exchange, 4.
...... Central line caller, 5 - ... Receiver, 6...
...Station side ringback tone, 7...PA
BXiill ringback tone, 8...PA
BX side dial tone, 9...Number display interface circuit.

Claims (1)

[Claims] The automatic private branch exchange that accommodates the extension telephone and the relay board receives the called extension number or the relay board call number and the calling number information sent from the central office line telephone that receives the call via the central office line, and (A central office line calling party number information display method characterized in that number information is displayed on either the extension telephone or the relay stand.